Heatsink



FIG. 1 is a perspective view of the heatsink showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a right side view thereof; the left side being a mirror image thereof.

The consistently broken lines shown in the drawings illustrate portions of the heatsink that form no part of the claimed design.

The heatsink is shown with a symbolic break in its length illustrated in long-short-short dashed lines. The appearance of any portion of the article between the broken lines forms no part of the claimed design. 

CLAIM The ornamental design for a heatsink, as shown and described. 